EGU2020-14958
https://doi.org/10.5194/egusphere-egu2020-14958
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

The Holocene Cedrus pollen record from Sierra Nevada (S Spain), a proxy for climate change in N Africa

Gonzalo Jiménez-Moreno1, R. Scott Anderson2, María J. Ramos-Román3, Jon Camuera3, Jose Manuel Mesa-Fernández4, Antonio García-Alix1, Francisco J. Jiménez-Espejo4, and José S. Carrión5
Gonzalo Jiménez-Moreno et al.
  • 1Departamento de Estratigrafia y Paleontologia, Universidad de Granada, Granada, Spain (gonzaloj@ugr.es)
  • 2School of Earth and Sustainability, Northern Arizona University, USA
  • 3Department of Geosciences and Geography, University of Helsinki, Helsinki, Finland
  • 4Instituto Andaluz de Ciencias de la Tierra (IACT), CSIC-UGR, Armilla, Spain
  • 5Department of Plant Biology, Faculty of Biology, University of Murcia, Spain

In this study, we synthesized pollen data from seven sites from the Sierra Nevada in southern Spain to investigate the response of forests in the western Mediterranean area to centennial- and millennial-scale climate changes and to human impact during the Holocene. In particular, here we focused in Cedrus pollen abundances, which most-likely originated from Northern Africa and were carried to Sierra Nevada by wind. Although Cedrus abundances are generally lower than 1% in the studied pollen samples, a comparison with North African pollen records shows similar trends at long- and short-term time-scales. Therefore, this record could be used as a proxy for changes in this forest species in North Africa. A Middle and Late Holocene Cedrus pollen increasing trend has been observed in the Sierra Nevada synthetic record, which seems to be the result of decreasing summer insolation. This would have produced overall cooler annual temperatures in Northern Africa (Atlas and Rif Mountains), benefiting the growth of this cool-adapted montane tree species, and lower summer evaporation, increasing available moisture during the summer, which is critical for this water-demanding species. Millennial- and centennial-scale variability also characterize the Sierra Nevada Cedrus synthetic record. Cedrus abundance oscillations could have been produced by well-known millennial-scale climatic variability that controlled cedar abundance in montane areas of N Africa.  

How to cite: Jiménez-Moreno, G., Anderson, R. S., Ramos-Román, M. J., Camuera, J., Mesa-Fernández, J. M., García-Alix, A., Jiménez-Espejo, F. J., and Carrión, J. S.: The Holocene Cedrus pollen record from Sierra Nevada (S Spain), a proxy for climate change in N Africa, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-14958, https://doi.org/10.5194/egusphere-egu2020-14958, 2020